Hi Community, i have a big problem. I want to write something like a ECHO - Funktion. That means i recive a char an send it back like in this source ...
void serial_int (void) interrupt 4 using 3 { static char chr = '\0'; if (RI == 1) { chr = SBUF; RI = 0; TI = 1; TL0 = 0xFF; } else if (TI == 1) { TI = 0; if (chr != '\0') { if (chr == '\r') chr = '\n'; SBUF = chr; while(TI == 0); TL0 = 0xFF; chr = '\0'; } } }
"But it's to (sic) slow too." What precisely do you mean by "too slow?" How long does it take? How long do you want it to take? What processor are you using, and how fast are you clocking it?
I have a device with four 7-seg. digits, i am multiplexing them by using the Timer0. My PS bit is set. It must be set using a baudrate 19200. So when i recive a byte i send it back. An the program jumb into the ISR again. And now the digits starts to flash because they were not multiplexed.